1 /* $NetBSD: lpt_jazzio.c,v 1.10 2011/07/01 19:25:42 dyoung Exp $ */ 2 /* $OpenBSD: lpt_lbus.c,v 1.3 1997/04/10 16:29:17 pefo Exp $ */ 3 4 /* 5 * Copyright (c) 1993, 1994 Charles M. Hannum. 6 * Copyright (c) 1990 William F. Jolitz, TeleMuse 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This software is a component of "386BSD" developed by 20 * William F. Jolitz, TeleMuse. 21 * 4. Neither the name of the developer nor the name "386BSD" 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ 26 * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS 27 * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT. 28 * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT 29 * NOT MAKE USE OF THIS WORK. 30 * 31 * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED 32 * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN 33 * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES 34 * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING 35 * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND 36 * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE 37 * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS 38 * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992. 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 */ 52 53 /* 54 * Device Driver for AT parallel printer port 55 */ 56 57 #include <sys/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: lpt_jazzio.c,v 1.10 2011/07/01 19:25:42 dyoung Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/device.h> 63 64 #include <machine/autoconf.h> 65 #include <sys/bus.h> 66 #include <machine/intr.h> 67 68 #include <dev/ic/lptreg.h> 69 #include <dev/ic/lptvar.h> 70 71 #include <arc/jazz/jazziovar.h> 72 73 int lpt_jazzio_probe(device_t, cfdata_t , void *); 74 void lpt_jazzio_attach(device_t, device_t, void *); 75 76 CFATTACH_DECL_NEW(lpt_jazzio, sizeof(struct lpt_softc), 77 lpt_jazzio_probe, lpt_jazzio_attach, NULL, NULL); 78 79 /* 80 * XXX - copied from lpt_isa.c 81 * sys/arch/arm32/mainbus/lpt_pioc.c also copies this. 82 * sys/arch/amiga/dev/lpt_supio.c doesn't. 83 */ 84 static int lpt_port_test(bus_space_tag_t, bus_space_handle_t, bus_addr_t, 85 bus_size_t, u_char, u_char); 86 /* 87 * Internal routine to lptprobe to do port tests of one byte value. 88 */ 89 static int 90 lpt_port_test(bus_space_tag_t iot, bus_space_handle_t ioh, bus_addr_t base, 91 bus_size_t off, u_char data, u_char mask) 92 { 93 int timeout; 94 u_char temp; 95 96 data &= mask; 97 bus_space_write_1(iot, ioh, off, data); 98 timeout = 1000; 99 do { 100 delay(10); 101 temp = bus_space_read_1(iot, ioh, off) & mask; 102 } while (temp != data && --timeout); 103 return temp == data; 104 } 105 106 int 107 lpt_jazzio_probe(device_t parent, cfdata_t match, void *aux) 108 { 109 struct jazzio_attach_args *ja = aux; 110 bus_space_tag_t iot; 111 bus_space_handle_t ioh; 112 bus_addr_t base; 113 uint8_t mask, data; 114 int i, rv; 115 116 #ifdef DEBUG 117 #define ABORT \ 118 do { \ 119 printf("lpt_jazzio_probe: mask %x data %x failed\n", mask, \ 120 data); \ 121 goto out; \ 122 } while (0) 123 #else 124 #define ABORT goto out 125 #endif 126 127 if (strcmp(ja->ja_name, "LPT1") != 0) 128 return (0); 129 130 iot = ja->ja_bust; 131 base = ja->ja_addr; 132 if (bus_space_map(iot, base, LPT_NPORTS, 0, &ioh)) 133 return 0; 134 135 rv = 0; 136 mask = 0xff; 137 138 data = 0x55; /* Alternating zeros */ 139 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 140 ABORT; 141 142 data = 0xaa; /* Alternating ones */ 143 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 144 ABORT; 145 146 for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */ 147 data = ~(1 << i); 148 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 149 ABORT; 150 } 151 152 for (i = 0; i < CHAR_BIT; i++) { /* Walking one */ 153 data = (1 << i); 154 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask)) 155 ABORT; 156 } 157 158 bus_space_write_1(iot, ioh, lpt_data, 0); 159 bus_space_write_1(iot, ioh, lpt_control, 0); 160 161 rv = 1; 162 163 out: 164 bus_space_unmap(iot, ioh, LPT_NPORTS); 165 return rv; 166 } 167 168 void 169 lpt_jazzio_attach(device_t parent, device_t self, void *aux) 170 { 171 struct lpt_softc *sc = device_private(self); 172 struct jazzio_attach_args *ja = aux; 173 bus_space_tag_t iot; 174 bus_space_handle_t ioh; 175 176 aprint_normal("\n"); 177 178 sc->sc_dev = self; 179 sc->sc_state = 0; 180 iot = sc->sc_iot = ja->ja_bust; 181 if (bus_space_map(iot, ja->ja_addr, LPT_NPORTS, 0, &ioh)) { 182 aprint_error_dev(self, "can't map i/o space\n"); 183 return; 184 } 185 sc->sc_ioh = ioh; 186 187 bus_space_write_1(iot, ioh, lpt_control, LPC_NINIT); 188 189 jazzio_intr_establish(ja->ja_intr, lptintr, sc); 190 } 191
Indexes created Sat Sep 20 22:09:52 GMT 2025